CODEWITHSUNDEEP
iosarraysswiftxcodeindexpath
danu
danu

Reputation: 1178

Get the indexPath of the relevant element in a loop

I'm working in a project in Swift 3.0 and I have a loop that would give me the state of an object (gives a boolean value in a an array sequence). My requirement is if the element state is "true" I wants to get the relevant index path of that, so using that indexPath I can get the whole object from my original array. So inside a loop how can i get that as well? My partially done code is below. In a comment I have stated where I wants to pass this indexPath.

func tapFunction(sender: UIButton) {

        // This gives me the selected indexPath
        print("ID :",sender.accessibilityIdentifier!)


        if let rowIndexString =  sender.accessibilityIdentifier, let rowIndex = Int(rowIndexString) {
        self.sateOfNewSongArray[rowIndex] = !self.sateOfNewSongArray[rowIndex]
        }
        sender.isSelected = !sender.isSelected


        for (element) in self.sateOfNewSongArray {

         //This is where I wants to pass the rowIndex that became true
            if element == true {
              selectedSongList.addingObjects(from: [songList[rowIndex]])

            }

        }
    }

Upvotes: 4

Views: 1764

Answers (1)

Krunal
Krunal

Reputation: 79656

Note: Make sure your array 'sateOfNewSongArray' has boolean types of elements

Try following solutions:

Sample Code 1: According to your current code in your question.

func tapFunction(sender: UIButton) {

    // This gives me the selected indexPath
    print("ID :",sender.accessibilityIdentifier!)


    if let rowIndexString =  sender.accessibilityIdentifier, let rowIndex = Int(rowIndexString) {
        self.sateOfNewSongArray[rowIndex] = !self.sateOfNewSongArray[rowIndex]
    }
    sender.isSelected = !sender.isSelected


  for (index, element) in self.sateOfNewSongArray.enumerated() {

    if element {
       if let songName:String = songList[index] {
          selectedSongList.append(songName)
       }
    }
  }

}

Sample Code 2: More easier and concise.

func tapFunction(sender: UIButton) {

    // This gives me the selected indexPath
    print("ID :",sender.accessibilityIdentifier!)

    if let rowIndexString =  sender.accessibilityIdentifier, let rowIndex = Int(rowIndexString) {
       if let songName:String = songList[rowIndex] {
          selectedSongList.append(songName)
       }

   }

}

enumerated() is a function, returns sequence of pairs enumerating with index and element of array (by iterating elements of array)

Here is basic sample code, for your understanding. Copy and execute this code:

let songList =  [“cat”, “dog”, “elephant”]
let sateOfNewSongArray = [false, true, false]
let selectedSongList = [String]()

for (index, element) in self.sateOfNewSongArray.enumerated() {

      if element {
         if let animalName:String = songList[index] {
              selectedSongList.append(animalName)
         }
      }
}

print(“selectedSongList - \(selectedSongList)”)

Upvotes: 1

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